Sparking igniter for internal-combustion engines.



No. 670,9l4. Paten tad Mar. 26, mm.

c. H. BLOMSTROM.

SPARKING IGNITER FOR INTERNAL COMBUSTION ENGINES.

(Application filed Nov. 8, 1898.;

(No Model.) 2 Sheets-Sheet I.

Witnesses. Inventor.

% Carl lon asrrona I 46 WM By W/ Att ofn ey m NORRIS PETE S 00. rnomuma, wnsnmm'on. n. c

Patelited Mar. 26' mm.

No. 670,914. v

c. H. BLOMSTRUM. SPARKINGIGNITER F05 INTERNAL COMBUSTION ENGINES,

(Application filed Nov. 8, 1898.:

2 Sheets-$heet 2.

(No Modai.)

Inventor.

Witnesses- Carl HQBZomsfrom By Attorney.

5 am & flwg CARL l-l. BLOMSTROM, OF MARQUETTE, MICHIGAN, ASSIGNOR TO THE LAKE SHORE ENGINE \VORKS, OF SAME PLACE.

SPARKING IGNITER FOR INTERNAL-COMBUSTION ENGINES.

SPECIFICATION forming part of Letters Patent No. 670,914, dated March 26, 1901.

Application filed November 8, 1898. fierial No. 695,912. (No model.)

To coll whom it may concern:

Beit known that I, CARL H. BLOMSTROM, a citizen of the United States, residing at Marquette, in the county of Marquette and State of Michigan, have invented certain new and useful Improvements in Internal-Combustion Engines, of which the following is a specification.

My invention relates to improvements in internal-combustion gas, gasolene, and other kindred engines; and the object of my invention is to so arrange the spark device in this class of engines as to dispense with the use of gearing, thus rendering it more simple and I5 efficient in construction than those in common use upon engines of this class. I accomplish this object by the mechanism illustrated in the accompanying drawings, in which- Figure 1 is a side elevation of an engine embodying my improvement. Fig. 2 is an end elevation of the same. Fig. 3 is a perspective of an igniting device and its connections. Fig. dis an end view of the same. Fig. 5 is an end and a side elevation of the timing-cam.

Fig. 6 is a longitudinal section of the sparking or igniting device substantially upon the line b b of Figs. 4 and 7. Fig. 7 is a transverse section of the same on the line a a. of Fig. 6.

The engine (shown in Figs. 1 and 2, respec- 0 tively) is constructed with the usual cylinder A, in which reciprocates a piston properly connected to rotate the main shaft B in the usual manner. On the shaft B is secured the eccentric O, which has a strap D, that is pro- 5 vided with a projecting lug E and a yoke F, which is tapped to receive the eccentricrod 9, the opposite end of which is pivoted to the rock-arm 6. This arm extends beyond the sleeve 5, as indicated at 6 in Fig. at, and

carries the pawl 3. The spring 4 rests at one end upon the arm 6 and at the other end upon the surface of the pawl 3 in such a manner as to hold the edge of the pawl in close contact with the surface of the timing-cam 7 5 and in position to actuate the movable arm 10, as follows: The eccentric C D is secured to the main shaft B and revolves therewith. This eccentric is connected with the rockarm 6 by the connecting-rod 9 and imparts to the end of this rod a vertically-reciprocating motion, which in turn is imparted to the pawl 3, which is supported upon and actuated by the arm 6'. The point of the pawl 3 lies normally just back of and under the end of the arm 10, and in its upward motion it carries said arm, and with it the arm 2, upward until the electrode 1 is brought in contact with the electrode M, where it is held until the point of the pawl 3 is thrown from under the arm 10 by the incline 7 on the timing-cam 7, the elasticity of the spring 12 allowing the arm 10 to be carried onward after the arm or electrode 1 and the arm 2 have been stopped until released by the timing-cam, as hereinbefore stated, when the rebound of the spring 12 will throw the arm 10 against the arm 2 with sufficient force to throw the electrode 1 away from the electrode M so suddenly as to induce an electric spark of sufficient tensity to ignite the gas in the cylinder A.

When the engine has attained the desired motion, the cam 7 may be thrown around to the position indicated by the dotted lines in Fig. i and the efiiciency of the engine increased by reason of igniting the gas at an earlier stage in the cycle of the engine.

To facilitate the action of the shaft 1, I place rollers 11 within the sleeve 5 around the shaft and form an adequate joint and support therefor by screwing the plug 13 into the end of the sleeve.

The sleeve 5 is secured to the wall of the cylinder A by bolts 14: 14, passing through the flange 5 and into the wall of the cylinder. The bolt 14 should pass far enough beyond 8 the wall of the cylinder to form a stop for the arm or electrode 1 when it isin its normal position.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is

l. The combination, in an electric igniting device for internal-combustion engines, of a fixed electrode, a movable electrode, an arm secured to the outer end of the revoluble elec- 5 trode, a spring-actuated arm loosely supported on said electrode and normally in contact with the fixed arm, a main shaft, an eccentric mounted upon said shaft, a rock-arm pivotally mounted upon the movable electrode and I00 connected to and actuated by the eccentric, a spring-actuated pawl pivoted to the opposite end of said rock-arm and in contact with the end of the spring-actuated arm, a timingcam having an incline in the path of said pawl, and a regulating-pin, and set-screw,substantially as and for the purpose set forth.

2. In combination, a stationary electrode,

' a supporting-sleeve, a rocker-arm supported thereon, a shaft Within said sleeve, a movable electrode attached to one end of said shaft, a'fixed arm attached to the other end of said shaft, a spring-actuated arm upon said shaft in contact with the fixed arm, a spring-actuated pawl mounted upon the rocker-arm and 

